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The sum of 5th and 9th terms of AP is 30...

The sum of 5th and 9th terms of AP is 30. If its 25th term is three times it 8th term, find the AP.

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Given sum of `5^(th)` term and `9^(th)` term of `AP=30`
`a+4d+a+8d=30`
`2a+12d=30 ->(1)`
And,
`25^(th)` term= `3 (8^(th)` term)
...
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